Recently, a 61-year-old diver discovered a "ghost fish" while diving in the deep sea (at the bottom of the Maltese waters). The ghost fish is completely transparent.

After the diver discovered the "ghost fish", the "ghost fish" did not escape and was caught by the diver for observation. After the diver recorded the video, the "ghost fish" regained its freedom. .

Although the "ghost fish" looks very much like a fish, in fact, the "ghost fish" is not a fish as we usually think of it. It is a jellyfish-like sea creature called a salp.

Salps (belonging to the animal kingdom Chordata, subphylum Chordates, subphylum Salps, class Salpsidae)? English name (?Salpa?), it usually feeds on plankton in the ocean, through inhalation Seawater is then sprayed out to achieve the function of moving in the water. Their body is barrel-shaped and their whole body is almost completely transparent. They are a kind of marine invertebrate. They usually live in cold seas and are widely distributed from Antarctica to the southern Arctic. It is rare to find such a creature in the waters of Malta in Europe. As the diver who discovered the "ghost fish" said, this is a marine creature he has never seen in his 40 years of diving.

Salps are a type of small pelagic gelatinous chordate. Found in warm seas, common in the southern hemisphere. The body is barrel-shaped, transparent, with circular muscle bands and open at both ends. The body length is generally 1 cm to 11 cm. Filter feeds on tiny plankton. The living environment is complex, with sexual and asexual periods alternating. During the asexual period many individuals are linked together in long chains (see picture above). Many kinds can shine.

The ocean absorbs excess carbon dioxide from the atmosphere, partly from the burning of fuels such as oil. Phytoplankton use this carbon dioxide to grow on the surface of the ocean where sunlight hits it. Animals eat the phytoplankton and produce carbon dioxide. But after the animal dies, much of this carbon dioxide dissolves and reenters the ocean, where it is reused by plants or bacteria, or returns to the atmosphere. Laurence Madin of the National Oceanographic Institute and his colleague Patricia Kremer of Connecticut College conducted four expeditions to the mid-Atlantic. Each time they discovered a special species of salps that grew exponentially in large swarms that could last for several months. Salps are translucent jellyfish-like marine organisms. Their position in the marine food chain is not important, but they are an important member of the greenhouse gas supply to the ocean. This view has greatly improved the salps' role among marine animals. status.

The salps that exist in groups in the ocean are each only the size of a human thumb. Billions of them gather together and live in the "hot areas" of the ocean. They can remove tons of water from the ocean every day. Carbon is transported from the ocean surface to the ocean depths. Salps are translucent jellyfish-like sea creatures that move by using jets that suck in seawater from the front and expel it from the back. As water passes through its mucous membranes, the salps absorb all the edible ingredients. ?The text in italics is excerpted from Baidu Encyclopedia?Salps